"Customer is always right."As the main rule of customer service states,but what if the customer tends to abuse this rule?How would you handle it?

Ethically and proactively attitude mandates the proper action to handle these misbehaves, like but not limited to :

- Explain to him "in written better" the severity of such behaves

- Evoke examples and experience of consequences of  such misuse,

- In case such abuse proved to be breach to laws and regulations it must be reported and escalated to the concerned higher management